Any way to have Simple Schema in Meteor validate a specific array index? - meteor

Question

From what I understand in the docs, you can define your schema like this:
MySchema = new SimpleSchema({
//This says that the addresses key is going to contain an array
addresses: {
type: [Object],
},
// To indicate the presence of an array, use a $:
"addresses.$.street": {
type: String,
},
"addresses.$.city": {
type: String,
}
});
Ok, I get this part. But what if I wanted to validate the contents in a specific array index? I want something like this:
MySchema = new SimpleSchema({
//This says that the itemsOrdered key is going to contain an array
itemsOrdered: {
type: [Object],
},
// Here I want to validate certain indexes in the array.
"itemsOrdered.0.sku": {
type: String
},
"itemsOrdered.0.price": {
type: Number
},
"itemsOrdered.1.sku": {
type: String
},
"itemsOrdered.1.price": {
type: Number
},
"itemsOrdered.1.quantity": {
type: Number
},
"itemsOrdered.2.sku": {
type: String
},
"itemsOrdered.2.price": {
type: Number
},
"itemsOrdered.2.customerNotes": {
type: String
optional: true
}
});
So here I'm trying to validate the values inside array index 0, 1, and 2. Each array index has a different item that has been ordered.
Normally I would use a hash table data structure, but for this purpose I need to preserve order which is why I'm using an array.
When I try to run this code I get an error Cannot read property 'blackbox' of undefined

Answer 1

Have you considered custom validation?
https://github.com/aldeed/meteor-simple-schema/blob/master/README.md#custom-validation
According to the doc within the function the key property of this will provide the information you want. So you could have something like:
MySchema = new SimpleSchema({
//This says that the itemsOrdered key is going to contain an array
itemsOrdered: {
type: [Object],
},
// Here I want to validate certain indexes in the array.
"itemsOrdered.$.sku": {
type: String,
custom: function () {
var key = this.key,
re = /\d+/;
var index = Number(key.match(re)[0]);
// Do some custom validation
}
},
"itemsOrdered.$.price": {
type: Number
},
"itemsOrdered.$.quantity": {
type: Number,
optional: true
},
"itemsOrdered.$.customerNotes": {
type: String,
optional: true
}
});
Here I put the validation logic in the sku field since it's required.